A database is a collection of ________ that has been organized in a meaningful way.

A system that simulates human thinking by emulating the biological connections of the brain is called ________.

An instrument designed to measure atmospheric pressure. It contains no liquid.

White, opaque, approximately round ice particles between 2 and 5 mm in diameter that form in a cloud either from the sticking together of ice crystals or from the process of accretion. Also called graupel.

A solid form of precipitation composed of ice crystals in complex hexagonal form.

The smallest scale of atmospheric motions.

An electronic instrument used to detect objects(such as falling precipitation) by their ability to reflect and scatter microwaves back to a receiver.

The lifting of air over a topographic barrier. Clouds that form in this lifting process are called orographic clouds.

Transparent or partially opaque particles of ice that range in size from that of a pea to that of golf balls.

The introduction of artificial substances (usually silver iodide or dry ice) into a cloud for the purpose of either modifying its development or increasing its precipitation.